CN111693169A - High-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection - Google Patents
High-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection Download PDFInfo
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- CN111693169A CN111693169A CN202010525144.4A CN202010525144A CN111693169A CN 111693169 A CN111693169 A CN 111693169A CN 202010525144 A CN202010525144 A CN 202010525144A CN 111693169 A CN111693169 A CN 111693169A
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- pressure
- sealing
- connecting piece
- piece
- pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Abstract
The invention discloses a high-pressure multipoint flexible thermocouple with a threaded connection seal, which comprises two process connecting pieces, wherein the two process connecting pieces are connected and sealed through a hollow nut and a set screw, the thread of the hollow nut is an Achrom thread, the other end of the second process connecting piece is connected with an equipment connecting pipe, the other end of the first process connecting piece is welded and connected with one end of a conical protection pipe, a seal is arranged at the opening of a thick-wall armored sleeve and is connected with an independent armored thermocouple wire, the thermocouple wire is in a wound cylindrical spiral shape, the other end of the independent armored thermocouple wire is connected with a compensation cable, the other end of the conical protection pipe is provided with a supporting plate, a leakage detection pressure instrument is arranged on the supporting plate and is connected with the conical protection pipe through the connecting pipe, and the high-pressure multipoint flexible thermocouple is extremely suitable for installation in a narrow space on the premise of not changing the size, the device has the advantages of simple installation, no limitation to installation space and equipment connecting pipe size in the aspect of maintenance and modification of old equipment.
Description
Technical Field
The invention relates to the technical field of thermocouple connection, in particular to a high-pressure multipoint flexible thermocouple sealed by high-pressure threaded connection.
Background
RJ flange sealing connection is mostly adopted for high-pressure multipoint flexible thermocouples used by reactors in the oil refining and chemical industry, the connection mode needs sufficient installation space outside the reactor, the outer diameter of a connecting pipe on the reactor needs to meet the outer diameter requirement of a corresponding flange, and if the outer diameter of the connecting pipe does not meet the outer diameter requirement, the opening arrangement of the reactor needs to be redesigned; secondly, in the process of maintaining and transforming the old reactor, the old reactor connecting pipe is difficult to meet the requirement of the outer diameter of the corresponding flange, and the conditions of complex installation environment and limited installation space exist.
The prior art solution usually increases or changes the position of the old reactor opening, and the original installation space needs to be changed correspondingly, so the modification cost is high, and the installation and modification difficulty is high.
Disclosure of Invention
Aiming at the problems, the invention provides a high-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection, which mainly solves the problems in the background technology.
The invention provides a high-pressure multi-point flexible thermocouple with high-pressure threaded connection sealing, which comprises a process connecting piece, wherein the process connecting piece comprises a first process connecting piece and a second process connecting piece, one end of the first process connecting piece and one end of the second process connecting piece are connected and sealed through a high-pressure threaded connecting piece and a positioning bolt, the thread of the high-pressure threaded connecting piece is an acme trapezoidal thread, the other end of the second process connecting piece is connected with a reactor connecting pipe, the other end of the first process connecting piece is connected with one end of a conical sealing cavity through a connecting sealing piece in a combined welding mode, and if the process connecting piece is a single-support multi-point type thermocouple, the process connecting piece comprises the: the armored pipe is characterized in that a plurality of independent armored wires are arranged inside the armored pipe according to the number of measuring points, the part of the independent armored wires, which is left in the conical sealing cavity, is in a wound cylindrical spiral shape, the armored pipe is in braze welding sealing with the wires, and the armored pipe is in welded connection with the connecting sealing element. The other end of the independent armor couple wire is connected with a compensation cable, a supporting plate is arranged at the other end of the conical sealing cavity, a leakage detecting instrument is arranged on the supporting plate, and the leakage detecting instrument is connected with the conical sealing cavity through a connecting pipe.
The further improvement is that the connecting surface of the first process connecting piece and the second process connecting piece adopts a sealing surface matched with a trapezoid concave-convex shape, and the bolt is positioned and stopped.
The improved structure is characterized in that an inner leakage prevention structure is arranged between the independent armor couple wire and the compensation cable, the inner leakage prevention structure is arranged on the sealing positioning piece, the sealing positioning piece is arranged between the supporting plate and the conical sealing cavity, and the inner leakage prevention structure is connected with the sealing positioning piece through threads and then is welded and sealed; the sealing positioning piece is connected with the conical sealing cavity in a welding mode.
The leakage detecting instrument is further matched with a valve group, the valve group is arranged between the connecting pipe and the leakage detecting instrument, a through hole is formed in the center of the sealing positioning piece, the connecting pipe is connected with the conical sealing cavity through the through hole, and the supporting plate is connected with the conical sealing cavity in a welding mode.
The improved leak detection device is characterized in that a support is arranged on the supporting plate and used for fixing the leak detection instrument and the valve group.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is extremely suitable for installation in narrow space on the premise of not changing the size, the number and the position of the equipment connecting pipe, and has the advantages of simple installation, no limitation to the installation space and the size of the equipment connecting pipe on the aspects of maintenance and modification of old equipment;
2. the invention adopts the connection sealing form of the hollow nut and the fastening screw, has the characteristic of small required installation space, is extremely suitable for the conditions of high-pressure working condition, difficulty in changing the size of the equipment connecting pipe and the like, and can bear the pressure of 60MPa at most by the compression connection of the hollow nut and the compression sealing of the matched sealing surface of the process connecting piece;
3. in a residual oil (heavy oil) hydrogenation reactor used in the early stage of the oil refining industry, a temperature thermocouple mostly adopts a protection sleeve type, the protection sleeve is used for a long time, the protection sleeve is damaged, the safety risk and the technical problem exist in repair, and the connecting interface of the thermocouple and equipment is generally phi 24mm in outer diameter and phi 7mm in inner diameter. According to the invention, under the conditions that a protective sleeve is not required to be repaired and an equipment interface is not changed, one interface can realize single-branch multi-point flexible installation, and the unused interface is blocked. The method is successfully used in the overhaul and transformation of a residual oil hydrogenation reactor in 2019 in 3 months of the company of Qilu petrochemical company.
Drawings
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
FIG. 1 is a schematic cross-sectional view of one embodiment (single-support multi-point) of the present invention;
FIG. 2 is a schematic cross-sectional view of another embodiment (multiple single-point type) of the present invention;
FIG. 3 is a schematic view of the external structure of an embodiment of the present invention;
wherein: 1. detecting a leak of the pressure instrument; 2. a valve block; 3. a support; 4. a support plate; 5. a compensation cable; 6. an inner leakage prevention structure; 7. sealing the positioning piece; 8. a conical protection tube; 9. welding a protection tube; 10. a first process connection; 11. a hollow nut; 12. independent armor wires; 13. a thick-walled armor sleeve; 14. tightening the screw; 15. a second process connection.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
The invention discloses a high-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection, and relates to a special process connection and sealing form. The method is suitable for single-support multi-point type (figure 1) and multi-support single-point type (figure 2). The sealing adopts trapezoidal concave-convex matching, and the sealing is connected and fastened through a high-pressure threaded connecting piece, and the bolt is positioned and stopped. The reactor connecting pipe comprises two process connecting pieces, wherein the two process connecting pieces are connected and sealed through a high-pressure threaded connecting piece and a positioning bolt, the thread of the high-pressure threaded connecting piece is an Achrom thread, one end of a second process connecting piece is connected with a reactor connecting pipe, and the other end of the first process connecting piece is connected with a conical sealing cavity and a connecting sealing piece in a combined welding mode. If the device is a single-support multi-point device: a plurality of independent armor wires are arranged in the armor pipe according to the number of the measuring points, the independent armor wires in the conical sealing cavity are in a wound cylindrical spiral shape and are filled with MgO powder, the armor pipe and the armor wires are sealed in a brazing mode, and the other end of the independent armor wires is connected with a compensation cable. The armor pipe is welded with the sealing connecting piece. The other end of the conical sealing cavity is provided with a supporting plate, a leak detection instrument is arranged on the supporting plate, and the leak detection instrument is connected with the conical sealing cavity through a connecting pipe. The invention has the advantages of reasonable structure, small volume, light weight and convenient installation and maintenance, and solves the problem of installation and use of the temperature instrument in the environment with narrow installation space and high pressure and danger.
Referring to fig. 1 to 3, a high-pressure threaded connection sealed high-pressure multipoint flexible thermocouple comprises a process connection piece, wherein the process connection piece comprises a first process connection piece 10 and a second process connection piece 15, one end of the first process connection piece 10 and one end of the second process connection piece 15 are connected and sealed through a high-pressure threaded connection piece 11 and a positioning bolt 14, the thread of the high-pressure threaded connection piece 11 is ACME trapezoidal thread, the other end of the second process connection piece 15 is connected with a reactor adapter, the other end of the first process connection piece 10 and one end of a conical sealing cavity 8 are combined and welded together through a connecting sealing piece 9, and if the process connection piece is a single-support multipoint type: the part of the independent armor wires 12 remaining in the conical sealing cavity 8 is in a winding cylindrical spiral shape, the armor pipe 13 is sealed with the armor wires through brazing, a plurality of independent armor wires 12 are connected inside the armor pipe 13 according to measuring point positions, and the armor pipe 13 is connected with the connecting sealing piece 9 in a welding mode. The other end of the independent armor couple wire 12 is connected with the compensation cable 5, the other end of the conical sealing cavity 8 is provided with a supporting plate 4, the supporting plate 4 is provided with a leakage detection instrument 1, and the leakage detection instrument is connected with the conical sealing cavity 8 through a connecting pipe.
In a preferred embodiment of the invention, the connection surfaces of the first process connection element 10 and the second process connection element 15 are sealing surfaces with trapezoidal convex-concave matching, and the bolts are positioned and stopped.
As a preferred embodiment of the invention, the other end of the first process connection piece 10 is welded and connected with one end of the conical sealing cavity 8 and the connecting sealing piece 9 in a combined mode.
As a preferred embodiment of the present invention, an inner leakage preventing structure 6 is further connected between the independent armored thermocouple wire 12 and the compensation cable 5, the inner leakage preventing structure 6 is installed on the sealing positioning member 7, and the sealing positioning member 7 is disposed between the supporting plate 4 and the tapered sealing cavity 8. Specifically, the independent armor wire 12 is in a cylindrical spiral shape, so as to facilitate installation of the inner leakage prevention structure 6 and the sealing positioning piece 7, and the specific operation is as follows, firstly, the basic connecting piece of the inner leakage prevention structure 6 is welded with the sealing positioning piece 7, then the independent armor wire 12 penetrates into the sealing positioning piece 7, is welded with the basic connecting piece of the inner leakage prevention structure 6, is welded with the compensation cable 5, and finally, the sealing positioning piece 7 is welded with the conical sealing cavity 8.
Specifically, the effect of leak structure in preventing is after the couple silk sheath is damaged, and the medium gets into the sheath inside, when along the sheath seepage, seals at the cold junction (the junction of thermocouple and cable is the cold junction), prevents that the medium from leaking, leak seal structure in preventing, and my company has already reported the patent, and here is not repeated.
As a preferred embodiment of the present invention, the inner leakage preventing structure 6 and the sealing positioning member 7 are threaded and welded, and the sealing positioning member 7 and the tapered sealing cavity 8 are welded.
As a preferred embodiment of the present invention, the leak detection instrument 1 is further provided with a valve group 2, the valve group 2 is disposed between the connection pipe and the leak detection instrument, a through hole is formed in the center of the sealing positioning member 7, the connection pipe is connected to the tapered sealing cavity 8 through the through hole, and the support plate 4 is connected to the tapered sealing cavity 8 by welding.
In a preferred embodiment of the present invention, a bracket 3 is disposed on the supporting plate 4, and the bracket 3 is used for fixing the leak detector 1 and the valve group 2. Specifically, the valve group is a component, and is composed of several mutually communicated valves, and the valve group is generally equipped when a leak detection instrument is equipped, which is the prior art and is not described herein again.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is extremely suitable for installation in narrow space on the premise of not changing the size, the number and the position of the equipment connecting pipe, and has the advantages of simple installation, no limitation to the installation space and the size of the equipment connecting pipe on the aspects of maintenance and modification of old equipment;
2. the invention adopts the connection sealing form of the hollow nut 11 and the fastening screw 14, has the characteristic of small required installation space, is extremely suitable for the conditions of high-pressure working condition, difficulty in changing the size of an equipment connecting pipe and the like, and can bear the pressure of 60MPa at most by tightly pressing and connecting the hollow nut 11 and tightly sealing the matched sealing surface of the process connecting piece.
In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (5)
1. A high-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection, a single-support multi-point flexible thermocouple and a plurality of single-point flexible thermocouples, and is characterized by comprising a process connecting piece, wherein the process connecting piece comprises a first process connecting piece (10) and a second process connecting piece (15), one end of the first process connecting piece (10) and one end of the second process connecting piece (15) are connected and sealed through a high-pressure threaded connecting piece (11) and a positioning bolt (14), the thread of the high-pressure threaded connecting piece (11) is an acme trapezoidal thread, the other end of the second process connecting piece (15) is connected with a reactor connecting pipe, the other end of the first process connecting piece (10) and one end of a conical sealing cavity (8) are also connected with a connecting sealing piece (9) in a combined welding mode, and if the process connecting piece is a single-support multi-point: a plurality of independent armor wires (12) are arranged in the armor pipe (13) according to the number of the measuring points, the part of the independent armor wires (12) remaining in the conical sealing cavity (8) is in a winding cylindrical spiral shape, the armor pipe (13) is sealed with the armor wires in a brazing mode, and the armor pipe (13) is connected with the connecting sealing piece (9) in a welding mode. The other end of independent armor idol silk (12) is connected with compensating cable (5), the other end department of toper seal chamber (8) is provided with layer board (4), be provided with leak detection instrument (1) on layer board (4), leak detection instrument through take over with toper seal chamber (8) are connected.
2. A high-pressure multi-point flexible thermocouple with high-pressure screw connection sealing according to claim 1, characterized in that the connection face of the first process connection element (10) and the second process connection element (15) adopts a trapezoidal male-female fit sealing face, and the bolt is positioned and stopped.
3. The high-pressure multi-point flexible thermocouple with high-pressure threaded connection sealing function according to claim 1, characterized in that an inner leakage preventing structure (6) is arranged between the independent armored thermocouple wire (12) and the compensation cable (5), the inner leakage preventing structure (6) is installed on the sealing positioning piece (7), the sealing positioning piece (7) is arranged between the supporting plate (4) and the conical sealing cavity (8), wherein the inner leakage preventing structure (6) is connected with the sealing positioning piece (7) through threads and then is welded and sealed; the sealing positioning piece (7) is connected with the conical sealing cavity (8) in a welding mode.
4. The high-pressure threaded connection sealed high-pressure multipoint flexible thermocouple according to claim 1, characterized in that the leak detection instrument (1) is further provided with a valve group (2), the valve group (2) is arranged between the connection pipe and the leak detection instrument, a through hole is formed in the center of the sealing positioning piece (7), the connection pipe is connected with the conical sealing cavity (8) through the through hole, and the supporting plate (4) is in welded connection with the conical sealing cavity (8).
5. A high-pressure screw connection sealed high-pressure multipoint flexible thermocouple according to claim 1, characterized in that a support (3) is provided on said support plate (4), said support (3) being used to fix said leak detector gauge (1) and said valve block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010525144.4A CN111693169B (en) | 2020-06-10 | 2020-06-10 | High-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010525144.4A CN111693169B (en) | 2020-06-10 | 2020-06-10 | High-pressure multi-point flexible thermocouple sealed by high-pressure threaded connection |
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| CN111693169A true CN111693169A (en) | 2020-09-22 |
| CN111693169B CN111693169B (en) | 2021-06-15 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806637A (en) * | 2009-02-13 | 2010-08-18 | 天津市中环温度仪表有限公司 | Adjustable armored thermocouple (resistor) with multipoint leakage resistance |
| CN201803808U (en) * | 2010-08-31 | 2011-04-20 | 浙江伦特机电有限公司 | Flexible thermocouple |
| CN103076106A (en) * | 2013-01-11 | 2013-05-01 | 浙江伦特机电有限公司 | High-pressure multi-point flexible thermocouple with leakage detector |
| CN103994837A (en) * | 2014-06-03 | 2014-08-20 | 浙江伦特机电有限公司 | Multipoint temperature sensor capable of measuring high temperature and low temperature |
| CN109341884A (en) * | 2018-11-08 | 2019-02-15 | 鑫国集团有限公司 | A kind of anti-high pressure leakage multipoint thermocouple |
| CN209310935U (en) * | 2019-01-21 | 2019-08-27 | 浙江伦特机电有限公司 | A kind of list branch multipoint thermocouple |
| CN111256854A (en) * | 2020-04-03 | 2020-06-09 | 淄博益源工程技术有限公司 | Inner leakage prevention structure of multi-point flexible temperature measuring element |
-
2020
- 2020-06-10 CN CN202010525144.4A patent/CN111693169B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806637A (en) * | 2009-02-13 | 2010-08-18 | 天津市中环温度仪表有限公司 | Adjustable armored thermocouple (resistor) with multipoint leakage resistance |
| CN201803808U (en) * | 2010-08-31 | 2011-04-20 | 浙江伦特机电有限公司 | Flexible thermocouple |
| CN103076106A (en) * | 2013-01-11 | 2013-05-01 | 浙江伦特机电有限公司 | High-pressure multi-point flexible thermocouple with leakage detector |
| CN103994837A (en) * | 2014-06-03 | 2014-08-20 | 浙江伦特机电有限公司 | Multipoint temperature sensor capable of measuring high temperature and low temperature |
| CN109341884A (en) * | 2018-11-08 | 2019-02-15 | 鑫国集团有限公司 | A kind of anti-high pressure leakage multipoint thermocouple |
| CN209310935U (en) * | 2019-01-21 | 2019-08-27 | 浙江伦特机电有限公司 | A kind of list branch multipoint thermocouple |
| CN111256854A (en) * | 2020-04-03 | 2020-06-09 | 淄博益源工程技术有限公司 | Inner leakage prevention structure of multi-point flexible temperature measuring element |
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Effective date of registration: 20230904 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: ZIBO YIYUAN ENGINEERING & TECHNOLOGY Co.,Ltd. Address before: No.377 Zicheng Road, Zichuan District, Zibo City, Shandong Province 255100 Patentee before: ZIBO YIYUAN ENGINEERING & TECHNOLOGY Co.,Ltd. |
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